A kinetic theory for the drift-kink instability
A kinetic theory for the drift-kink instability
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DOI：
10.1029/97ja02140
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发表时间：
1997-12
影响因子：
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通讯作者：
G. Lapenta;J. Brackbill
中科院分区：
文献类型：
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作者：
G. Lapenta;J. Brackbill
我们发展了一个线性二维动力学理论，它是由漂移-扭结不稳定性的最新结果所推动的。该理论预测，与磁尾中性片近地区域的条件相对应，离子-电子温度比(Ti/Te)较大、漂移速度适中、离子/电子质量比(mi/me)较大时，等离子体不稳定。理论预测的生长速率与非线性等离子体模拟结果吻合较好(但模结构不一致)，包括隐式电磁模拟得到的具有真实离子电子质量比的线性生长速率。
We have developed a linear two-dimensional kinetic theory, which is motivated by recent results for the drift-kink instability. The theory predicts plasma instability for large values of ion-electron temperature ratios, Ti/Te, moderate drift speeds, and large ion-electron mass ratios, mi/me, corresponding to conditions in the near-Earth region of the magnetotail neutral sheet. The growth rate predicted by the theory is in good agreement with nonlinear plasma simulations (but the mode structure is not), including linear growth rates obtained with an implicit, electromagnetic simulation with realistic ion-electron mass ratio.